Testing device



Aug. 23, 1927.

' TESTING DEVICE Filed Aug. 1, 1924 4 2 Sheets-Sheet -1 (Uyl/venirci Edward Q 770/7706.

Aug- -'2 3 1927' E, G. THOMAS TESTING DEVICE.A

' Filed'Aug. 1, 1924 2 Shoots-Sheet 2 iaiaatdiL Aug. 23, 1927.

omiso STATES iArEgNfg nnwiinne. THOMAS, or TOLEDO, cierro,l AssrGNon TO IrOLnnO SCALE COMPANY, or

.'rOLnrDO, HrO, AcOnPonATioNOF NEW JERSEY.

A'riisriiva nnvron.

iippiicafioniiied august y1, 1924.v serial No. 729,520.

This invention relates to devices :for ltesting the weight Iper unit of length [of pliable materia-l in'A strip forni. `lla'chines for producing paper, thin-sheet in'etal,fcoatedfab ries and similar productsare `usually Hprof vided with means whereby the weight` or thickness of 'the material produced maybe increased or decreased. It is ordinarily very difficult, however, to detect small variations in the weight or thickness'of the material' untill a considerable length lhas been pro-l duced and a machinefor detecting `such vari ations inustbervery sensitive and at the saine time not inlluen'c'edby changes 1n conditions l5 other than changes inthe weight of the may teria'l being tested.V One of the principal ob# 'jects of 'my invention is the provision of a very sensitive testing device which is'not influenced byy changes in the tautness of the stripbeing tested. Y Another object `is to? provide a testing device of simple and compact construction having load-counterbalancing and indicating mechanism positioned directly above the i5 strip supporting element so that the space occupied by thedevice iseconomized.

Another Object is the `provision of simple means for suspending the strip-supporting elementv directly from al pivotfof theweigh` 3U ing mechanism. i l f 'i Y Still another object is the provision of a simple, compact'device of the character described lwhich `is of sturdy Vconstruction and in which the sensitive mechanism` is tected by substantially tight casing. kr

Otherobjectsand advantages will be ap parent from' the following description7 vin which reference is had to the accompanying drawings `illustrating preferred embodiment of myfinvention andwherein similar reference numerals"designate similar part-s throughout theseveral views. s

Intliedrawingsf Figure I is an elevational view ofatesting ydevice,embodying my invention, 'showing' a strip ofinaterial to be tested in position thereon; Y Figure H is an enlarged side elevational View or" the testing device, parts being broken away and parts shown in section;

Figure III is a front elevational view of the testing device, the housing being shown in section and other parts broken away.

Referring to the drawingsv in detail, the strip of material y after emerging from the Prof .the fraine'tl atl and to the pedestal at 1G. f The length of the link is the saine as the disproducing machine (not shown) is passed over a'pair rof parallel rollers B vand Bk which are rotatably supported in anti-fricf` tionV bearingscarried in the upper extremi-` tiesrof uprights'or standards A andA.. Lo catedmidway between thestandards'A and A :isa pedestal l which is surmounted by a bon-like housing?J upon one` end ofwhich is supported `an 'upright housing 3 which contains the automatic load-counterbalancing 65 and indicating mechanism of the device. idithin the bOX-lilre housing 2 a pair of fuicruin stands 5 which support a inainlever G through the medium of lrnife edge pivots 7 n'liichare fixed A frame 9 is suspended yfrom load pivots l0 which project from the lever 6, and carries acylind'er or roll 11, the roll 4ll being mounted upon a shaft .l2 which is journaled in antiirictio'n bearings in the frame 9.

For the p urposeof preventing the frame 9 from swinging on the load pivots lO its lower end'isconnectcd tothe pedestal l by y means vof a check link 14 which is pivoted tov tance between the fulcruin and load pivots-of the lever (i. `The pivot i6 being preferably directly beneath 'the fulcrun'i 'pivot 7'of` the n lever, the fulcrum and loadpivots and-the pivots at the'ends ofthe link lll therefore lie in; parallelogrammatic relation and the frame 9 remains vertical duringall weigln ing movements, the axis of the roller ll always lying directly `beneath `the axis" of the load pivot 10. y The nose of thelever G is connected by means of a stirrup'l and llink 19 to a `loadcoiinterbalancing pendulum 2O which is 'mounted upon a pairof supports Q2 fixed to f the lower end of the upright housing 3,and

fixed to the pendulum 29 is'fan indicator hand Q3 which cooperates with a chart 24 to indicate' variations over andfunder` the normal weight ofthe strip as it passes over the .roller l1. n 1

A dash pot vibration damping device 2G, having its plunger connected to the lever G serves to damp vibrations Of the indicating mechanism while in operation. we

In order that the device may be used for testing materials of widely varying weights without change of the mechanism, the lever 6 is provided with a graduated beam 27 upon which is slidably mounted a poise 28 which HU in the lever 6. To

fie

may be moved to position to counterbalance the roller ll. The beam and poise are readily accessible through an opening in the side ot the housing 2, which also gives access to the lever mechanism and dash pot. A cover 30 hinged to the housing at 3l serves to close the opening in the housing when the testing device is in use. and this cover may, ii desired, be pro 'ided with a look to prevent tai'i'ipering with the mechanis n or unauthfn ized shifting ot the poise.

In the operation of the device a strip oi rmaterialll is positioned.. on the rollers I3,

B and ll and the poise 2S is moved to position in which the indicator' hand 23 will register with the predetermined weight marl: O when the material is of the normal or required weight. l/Vith the indi ator lia-nd i this position the upper sides oit the rollers B, B and ll are tangent to the same plane and the wi 'ght supported by the roller il is halt the weight ot the n'iaterial between the rollers B and B. lilith the rollers thus tangent to the same plane the share ot the weight carried by the roller l1 remains the same regardless ot the tautness ot the strip ot material, and changes in the tautness of the strip will not cause a change .in the indication unless the change in tautness is sutiiciently great to cause an appreciable change in the length et the strip between the rollers B and B. Under the conditions in which the device is used the tension on the strip is very great as compared to the weight ot the strip, so that it is always taut and no appreciable change in load results from varia tions in tension. Since the roller 1l supports halt ot'the portion ot the strip between the rollers I3 and B, any increase in the weight ot the strip will depress the roller 1l and any decrease will allow it to be pulled upwardly by downward movement of the pendulum 20. Either movement ot the roller l1 will be accompanied by movement Vot the indicator hand 23 away from the predetermined weight mark on the chart 24: so that the change in weight will be indicated and the necessary adjustments to bring the material back to the required weight may be made promptly.

The embodiment ot my invention herein shown and described is to be regarded as illustrative only, and it is to be understood that the invention is susceptible to variation, modilica'tion and change within the spirit and scope ot the subjoined claims.

Having described my invention, I claim:

l. In a device ot the class described, in combination, a pedestal, a housing mounted thereon, load-counterbalancing and indicating mechanism within said housing, a 'trame suspended Ytrom said loarl-counterbalancing and .indicating mechanism below said housing, and a roller supported by said trame and ada ited to engage and support a portion ot a strip oi material to be tested.

2. In device ot the class described, in

combination, a pedestal having an opening' therein, loa-d-counterbalancing and indicat-A ing mechanisin supported on said pedestal, a trame suspended -from said load-counterbalancing and indicating mechanism and hanging within said opening in said pedestal, and a roller supported by said frame and adapted to engage and support a portion ot a strip oit material to be tested.

3. In a uevice oit the class described, in combination, a pedestal, housing means supported the-i on, load-counterbalancing and inoicating mechanism supported within said housing means, said housing means having an opening and a ccver there'l'or to permit access to parts ot said loacl-counterbalancing mechanism, a 'frame suspended from said load-counterbalancing mechanism, and af roller supported by said iframe and adapted to engage and support a portion ot a strip oi material to be tested.

In a device ot theclass described, in combination, a. pedestal, housing means supported thereon, load-counterbalancing and indicating mechanism within said housingl means, said pedestal having an opening therein, a trame Cuspended from said loadcounterbalancing mechanism and hanging within said opening, and a roller supported by said iframe within said opening and adapted to engage and support a. portion o'l' a strip of material to be tested.

In a device ot the class described, in combination, a pedestal, housing means supported thereon, load-c imnterbalancing and indicating mechanism within said housing means, said load-counterbalancing and indicating mechanism including a lever havinga -tulcrum and load pivot, a trame suspended trom said lever and hanging beneath said housing means, a roller supported by said trame and adapted to engage and support a portion of a piece ot' Yt'abric to be tested, and a check link connected to said trame and to said pedestal.

ED`WARD G. THOMAS. 

